Quiz 2 Review

1. Quiz 2 Review

2. Topics To Study • Chapters 4 and 5 • Structures • Enumeration • Functions: Pass by Value Pass by Reference Overloaded Functions Recursion

3. Structures struct cppclass { int students; int room; }; int main() { cppclass first = {21, 1105}; cppclass second = {14, 1165}; first = second; cout << first.students << endl; cout << first.room << endl; return 0; }

4. Program Output 14 1165

5. Enumeration enum days_of_week { Sun, Mon, Tue, Wed, Thu, Fri, Sat }; int main() { days_of_week day1, day2; day1 = Mon; day2 = Thu; int diff = day2 - day1; cout << "Days between = " << diff << endl; if(day1 < day2) cout << "day1 comes before day2\n"; return 0; }

6. Program Output Days between = 3 day1 comes before day2

7. Functions Pass By Value #include <iostream> using namespace std; int quiz(int number) { number = 100; return number; } int main() { int variable = 0; cout << variable << endl; cout << quiz(variable) << endl; return 0; }

8. Program Output 0 100

9. Functions Pass By Reference #include <iostream> using namespace std; void quiz(int& number) { number = 0; } int main() { int variable = 100; quiz(variable); cout << variable << endl; return 0; }

10. Program Output 0

11. Function Overloading #include <iostream> using namespace std; void printnum(); void printnum(int); void printnum(int, int); int main() { int var = 15; printnum(); printnum(var); printnum(var, 10); return 0; }

12. Function Overloading void printnum() { int num = 10; cout << num << endl; } void printnum(int num) { cout << num << endl; } void printnum(int num, int sub) { int ans = num - sub; cout << num << endl; }

13. Program Output 10 15 15

14. Functions - Recursion int getcount(int); int main() { int count; count = getcount(5); cout << count << endl; return 0; } int getcount(int cnt) { if (cnt != 1) cnt += getcount(cnt-1); else cnt = 1; return cnt; }

15. Program Output 15